Azo dyestuffs



nited States Patent Patented Aug. 13, 1963 3,100,768 AZO DYESTUFFS Raymond .Gunst, Binningen, Switzerland, assignor to Ciha Limited, Basel, Switzerland, :1 company of Switzerland No Drawing. Filed July 17, 1961, Ser. No. 124,361 Claims priority, application Switzerland July 17, 1959 7 Claims. (Cl. 260-153) in which R represents the residue of a diazo-component free from azo-linkages, and advantageously the residue of a benzene or naphthalene sulfonic acid, p and 11 each repi resents the whole number 1 or 2, and X represents the radical of a halogenated 1:3:5-triazine :of the formula Halogen bound through an amino bridge, and especially an NH bridge, in which formula Z represents an anthraquinone radical of the formula -SOsH with an amino-monoazo-dyestufr" of the Formula 2 in which R and n have the meanings given in connection I with Formula 1, and m is the whole number 1, 2.01" 3, and,

on the other, with an anthraquinone dyestulf of the Formula 3 lfHz co O USOaH (10 I (S03H)n-1 NH in which n is the whole number 1 or 2, the condensations being carried out in either order of succession and in such manner that the triazine condensation product obtained contains halogen.

For making the starting material of the Formula 2 there are used as coupling components, for example, a-naphthylamine, 2-methoxy-l-aminonaphthalene 6 "sulfonic acid, and l-aminonaphthalene-8-sulfonic acid, or especially 1- amino-naphthalene-6- or -7-sulfonic acid.

The diazo-componentsto be coupled with the aforesaid coupling components contain substituents that impart solubility in water, for example, strongly acid substituents imparting solubility in water, such as sulfionic acid groups.

These diazo-components may be derived from relatively simple compounds, for example, 'aminobenzene sulfonic acids, amino naphthalene sulfonic acids, aminopyrene sulfonic acids, chrysene sulfonic acids or aminonaphthalene sulfonic acids; especially valuable are the diand trisulionic acids .of the naphthalene and the mono and disulfonic acids of the benzene series.

As examples of amines of which the diazo compounds are useful for coupling with the aforesaid coupling components containing acylat-able amino groups there may be mentioned, for example: a 7: 7

l -aminobenzene-l -3-.. or -4;sulfonic acid, 1-aminobenzene-2 -3- or -4-oarboxylic acid, l-aminobehzene-ZA- or 2,5-disulfonic acid, 2-amin'o-1-methoxybenzene-4-sulfonic acid, l-amino-4-methoXybenzene-2-sulionic acid, 3-arnino 2-hydroxybenzoic acid-S sulfonic acid, 3-amino-6-hydroxybenzoic acid-5-sulfonic acid,

2-methoxyor Z-methyl-1-aminobenzene-4-sulfonic acid,

S-acetylamino-2-aminobenzene-l-sulfonic acid, 4-acetylamino-2-aminobenzene-l-sulfonic acid, l-aminobenzene-E) :5-disulfonic acid, 5-amino-2-nitro-benzoic acid, 2:4-dimethyl-l-aminobenzene-6-sulfonic acid, 2-methyl-4-chloro-l-aminobenzene-G-sulfonic acid, Z-aminobenzoic acid-4- or -5-sulfonic acid, 1-aminonaphthalene-4-, -5-, -6-, or -7-sulfiomc acid, 2-aminonaphthalene-4-, -6-, '-7- or -8-sulfonic acid, laminonaphthalenc-3 G-disulfonic acid, l-aminonaphthalene-2r5 7-tri sulfonic acid, l-aniinonaphthalene-Z 4 :-8-trisulfonic acid, l-aminonaphthalene-3 :6: 8-trisulfonic acid, 1-aminonaphthalene-4:6:8-trisu1fonic acid, 7 j v 2-aminonaphtl1alene-1:3:7 or 3:5 :7-trisulfonic acid, 2-aminonaphthalene-4: 6: 8 or 3 6 8-trisulfonic acid, 2-aminonaphthalene-4:8-, 5:7- or 6:8-disulfonicacid, 1-(3'- or 4-aminobenzoyl)-aminobenzene-3 sulfpnic. acid, 3-aminopyrene-8- or -10-monosulfonic acid,

' 3-amindpyrene-5:8-' or jiz'lfl-disulfonic acid,

4-nitro-4'-aminostilbene-2:2'-disu1fonic acid, and also O-acetyl-derivatives of aminonaphthol sulfonic acids, for

example, the Q-acyl-derivatives of l-amino-S-hydroxynaphthalene-3:6- or -4:6-disulfonic acid, dehydrothiotoluidine-monoor disulfonic acid and the like.

The diazo compounds obtained, for example, by diazotisation with a mineral acid, especially hydrochloric acid and sodium nitrite, are coupled with the aforesaid aminonaphthalene-sul-fonic acids by methods in themselves known.

The condensation of the :aminomonoaZo-dyestufis so obtained with cyanuric chloride is carried out in such manner that the resulting condensation product still contains two exchangeable halogen atoms, of which one is subsequently exchanged in the process of this invention for the radical of an amino-compound of the Formula 3. As such amino-compounds there may be mentioned, for example, 1-.amino-4-(3-'aminopl1enyl-amino)-anthraquinone-4z2-disulfonic acid and 1-amino-4-(4' aminophenylamino)-anthraquinone-3':2-disulfonic acid, and also 1- amino-4-(3'- or 4-am-inophenylarnino)-anthraquinones- 2-sulf'onic acid and =1-amino-4 (3-arnino-4-methylphenylamino)-anthraquinone-2-sulfonic acid.

The condensations are advantageously carried out with the use of an acid-binding agent, such as sodium carbonate or sodium hydroxide, and under conditions such that the final product contains an exchangeable halogen atom, that is to say, they are carried out, for example, in an organic solvent or at a relatively low temperature in an aqueous medium.

The dyestutfs of this invention are suitable for dyeing and printing'a very wide variety of materials, such as wool,silk, leather and polyamides, but especially fibrous cellulose-containing materials, such as linen, regenerated cellulose, and above all-cotton. They are especially suitg sodium hydroxide the pH value is maintained throughable for dyeing by the so-called paddyeing method, in

which theggoods are impregnated with an aqueous dyestufi solutionfwhich may contain a salt, and the dyestuif is fixed on the fiber by treatment with an -alkali, advantageously at a raised temperature. This method and also 'the direct dyeing methods, which can be used with many of the dyestufis of this invention, yield valuable dyeings that are fixed fast to washing, and by printing methods fast prints are obtained.

"Ifhe dyeings and prints produced on cellulose-containing fibers with the dyestuffs of this invention are generally distinguished by their. good fastness to light and above all by their excellent [properties of wet tastness, especially their very good tastness to washing. i

The following examples illustrateiihe invention, the parts and percentages being by weightz Example 1 18.6 parts of cyan-uric chloride are finely suspended in 300 parts of ice, and 200 parts of water. There is added aneu-tral solution of 48.9 parts of l-amino-4-(4-aminophenylamino)enthraquinone-Z:3'-disulfonic acid in 500 parts of water, and the whole is stirred for two hours at 5-10" C. By {the addition of aydilu'te solution of out between 6 and 7. There is then added a neutral solution of 55.6 parts of amino-.azo-dyestufi obtained as described in Example 2, by diazotizing l-amino-naphthalene- 6-sulfonic acid and coupling the diazo compound with 1- amino-naphthalene-6-sulfonic acid. The reaction mixture is heated to 40 C. and stirred for six hours. By the periodic addition of a dilute solution of sodium. hydroxide the pH value is maintained throughout just above 7.

By the addition of sodium chloride the dyestuit formed is precipitated, and it is then dried. It dyes cellulose iibers by the so-called pad dyeing method fast olive green tints.

Example 2 strength are added, and diazotization is carried out at 20 C. with 7.1 parts :of sodium nitrite. After minutes the diazotization is finished. There is run in at a temperature of 5-l0 C. a solution, adjusted to a pH value of 7, of 22.3 parts of 1amino-naphthalene6-sulfonic acid in 200 parts of water. By the periodic addition of solid sodium carbonate the pH value is maintained at about 4. After stirring the mixture for 3-4 hours the coupling is finished. The coupling mixture is adjusted to a pH value of 7 with a dilute solution of sodium hydroxide, the mixture is cooled to 0 C. by the addition of ice, and the whole is added to a fine suspension of 18.6 parts of cyanuric chloride in 300 parts of ice water. The whole is stirred for two hours at 0' to 5 C., and the pH value is maintained at 5-6 hy the'periodic addition of a dilute solution of sodium hydroxide.

There is then added a solution, adjusted to .a pH value of 7, of 48.9 parts or" l-amino-4-(4aaminophenylamino)- anthraquinone-Z:3'-disulfonic acid in 500 parts of water,

and the whole is heated to 40 C. and stirred for six hours at that temperature. The pH value is maintained at about 6 throughout.

By the addition of sodium chloride the dyestufi formed is precipitated, and it is then dried. It dyes cellulose fibers by the so-called pad dyeing method or by the exhaustion method fast olive green tints.

By the methods described in Examples 1 and 2 further very similar olive to olive-green dyestuffs can be prepared by using cyanuric bromide instead of cyanuric chloride.

In the'tollowing table are given further examples of dyestuffs obtained by condensing cyanuric chloride, on the one hand with the yellow monoazo-dyestufis given in column .I and, on the other, with the anthraquinone dyestuffs mentioned in column II. In column 111 are given' the tints of the dye or prints produced on cotton with the resulting monochlorotriazine compounds.

. r 11 In Monoaz o-dyestufi v inthraquinone dyestufi Tint Diem-component Coupling component 1-amino-2-methyi-benzene-4-sulfonic ucid.... 1-aminonaphthalene-fi-smfon- 1-aminc-4-(4-amino-phcnyl-ami.no)-anthraquinone- Olive green.

' T ic acid. 7 2,3rdisultomc acid. 2-aminonaphthalene-5:7-disulf0nic acid o .---.d0 Do. Z-aminonaphthalene-S fi-disulfonic acid .....d do Do. z-aminonaphthalene-dt:8disult0nic acid 1-aminonaphthalene-8-su1f0n' do Do.

. 1 ac Do 1- amin3naphthalene-7-sulfonn Do.

1c aci i r I Do... do 1-amino-4-'(3-aminophenylamino)-anthraquinone- Olive. 2,4-disult0nic acid. Do 1-aminonaphthalene-G-sulfon- 0 Do. react I l-aminobenzene-Z:5 disuiionieacid. Olive green. 1-am1nobenzene-3:5-disu1fonic' id do p Do.

l-aminobenzene 2zfi-disulfonic c l-amino-i-(i -aminophenylamino) -anthraquinone- Green.

2,3-disulf onic acid. 130.; V rln 1-amino-4- (4 -aminopl1enylamin0) anthraquinone-Z- Do. i sulfonic acid. 1-aminonaphthalene-2z5:7 trisulfonic acid..- rln Do. i Do... wNaphthylamine l-amino-i- (3'-amin0phenyiamino) -anthraquine- Olive.

L 2.4-disulionic acid.

I 11 III Monoazo-dyestufi l Anthmquinone dyestufl Tint Diazcomponent Coupling component 2-aminonaphthalene-GzZK-disulfonic acid 1-aminonaphthnlene-tisulfon- 1-amin0-4-(3-aminophenylamino) -anthraquin0ne- Olive.

ie acid. 2,4-disuifonic a d. 2-amin0nnphtha1ene-4:S-disulfonic acid do l-amino-4-(4, N-methylaminophenylamino) an- Do.

thraquinone-2,3-disulionic acid. l-aminonaphthalene5:7-disulfonic acid do .do Do. Mixture of the 2-aminonaphthalenc-4:S-With -d0 i 1amino-4- (3 -aminophenylamino) anthraquinone- Do.

the -6:8-disulfonic acid. 2,4-disulfonic acid. 1-aminonaphthalene2z5:7-trisulfonic acid-.. a-Naphthylamine l-aminck (4 -amin0phenylarnin0) anthraquinone- Yellowish green.

2-su1fon1c acid.

Example 3 v wherein n and p each is a whole positive number up to 2 parts of the dyestuffs obtained as described in Ex- 2 and R represents a member selected from the group ample F dissolved 100 P Of A cotton consisting of the sulfobenzene and sulfonaphthalene radifabric 1s impregnated with the resulting solution at 60-80 Gals and X a member Selected from the group consisting C. on a padding machine, and the excess of liquid is squeezed off to an extent such that the material retains 20 of bromine a chlorme atom 75% of its weight of dyestutf solution. The dyestuffs of h fomlula' l amrx (HO3S n -NH '-s0311 C q-1H2q-1 NH2 l o o The goods so impregnated are dried, and then imwherein n is a whole positive number of at least two and Pmgnated room Wmperature a Solutiol} which at most three, q, p and m represent each a whole positive tains, per liter, 10 pants of sodium hydrox de and 300 4 number up to and including 2, p+m being at least parts of sodium chloride, squeezed to a Weight increase 3. A dyestuff iOf the formula of 75 and steamed for 60 seconds'at 100101 C. The material is then rinsed, treated with a sodium bicarbonate solution of 0.5% strength, rinsed, sc aped for hour in a solution of a non-ionic detergent of 0.3% strength, rinsed and dried. There is obtained a dyeing that is fast CMHQM C1 to washing and light. I I

What is claimed is: so H 1. A watersolubie monoazo dyestufi' which corresponds N \N i a to the formula our-ii o-NH wherein m and n represent each a whole positive number up to and including 2.

4. The dyestutf of the formula SOaH SiOaH 510311 SOQH S0311 Cl 5. The dyestuff of the formula 7. The dyestuff of the formula References Cited in the file of this patent UNITED STATES PATENTS 2,167,804 Gubler et a1. Aug. 1, 1939 2,951,837 Andrew et a1. Sept. 6, 19 60 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. $100,768 August 13 1963 Raymond Gunst ed that error appears in the above numbered pat- It is hereby oertiii at the said Letters Patent should read as nt requiring correction and th orrected below.

Column 5, lines 50 to 67 the right-hand portion of the formula should appear as shown below instead of as in the patent:

NH (SO H) O Signed and sealed this 12th day of May 1964.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Attesting Officer Commissioner of Patents 

1. A WATERSOLUBLE MONOAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA 